Brake shoe and holder



TMW

N. P. SJOBRING ET AL BRAKE sHoE AND HOLDER July 2, 1929.

Filed Feb. 15. 1.927

A TTORNEY- Patented July 2., 1929. i l i i UNITED N STA rEs PATENT oEFicE.

NrLs 1 sJorBRINe, or CHICAGO; ILLINOIS. Alun ARE Aarrrrm cHRIsTENsoN, or GoTTENBoao, swEnnN.

BRAKE SHOEr AND HOLDER.

Application 4filled February 151-927.` Serial No. 168,417". l

Ourinvention relates to animprovedholdofthenarrowed portions 1`5 and 16 and of er for brake shoes, whereby: theshoe is susthe clamping members 17 and 18, are formed tained or supported upon its holder at or near with dovetailed` recesses to receive the doveits oppo-site ends, so that in the event of tai-led` projections 13 and 14 on the brake fracture of the shoe the broken parts thereof Shoe.` l

will be retained in position, and will continue The lower end of the clamping memberf17 to perform its functions in connectionwith is provided with atransverse groove ,19` which the wheel of a railwayear, until inspection receives a transverse tongue 20 formed upon j reveals the defect. l the `brake shoe holder at the base of the narf The construction of the brakeshoe holder rowed portion 15, the tongue and groove cono5 is-very simple, and vis such as to permit quick` nection being such as to guide and properly replacement 'of the broken shoe `by another position the clamping member 17 upon the one. L l j. i.. holder 10,. the formation of the tongue .and`

Y The invention will now be described in de-` groove being such as to exclude moisturefrom f tail, and the novelty thereof pointed out in odgement therein. A similar tongue and 7o the appended claims. i groove connection is provided between the In theaccompanying drawingz: l clamping member 18 and the brake :shoe

igure 1 isaview in side elevation sho-wing holder, for `the same purpose. llhe projecour improved brake shoe holder with a brake tion liand the clamping member 17 are pro- 20 Shoe therein, vided with aligned perfor-ations, through 75 j 'Figa 2 is a view in elevation of the holder, which a `bolt 21 is passed,.the bolt being pro looking from the rightof Fig. 1, the brakey vided with a locking nut: 22. By this means shoe'being omitted. r Y, l. h l the" upper dovetailed projection 18 on the Fig. 3 is a horizontal sectional view on the brake shoe 11 is firmly clamped. A bolt 23,

line 3-8, Fig. 1. i, l passed through aligned perforations in the so Brake shoesof the present type are usually lower projection 16and the clamping memmaintained upon their holders at a single ber 18, and provided with a locking nut 24, connecting point, and are frequently subject serves in the same manner to clamp the lower j to` fracture, byjreason of failure.` to support dovetailed projection 14. y 1

`the same at its rear side in such` manner that By means of the two clamping` structures e5n t e support will be `substantially coextensive described, the brake shoe 11i's rigidly conwith the area of the braking surface of the nected to the brake shoe holder 10. The arcushoe. Under such conditions, a portion of ate face of the brake shoe holder 10 is conthe brake shoe will become loose and fall centric with that of the rear face of the brake j away, thus reducing,r the efliciency of the shoe 11,so thatacloseline of contact between 90 rake apparatus, and being sometimes conthe meeting faces of the parts is maintained tributive to disaster. when the brake shoe is positioned upon its In the drawing, the numeral 10 indicates holder. However, shallow channels 25 and a brake shoe holder constructed in accordance 26 may be cut transversely in the face of the with our invention, and 11 a brake shoe atholder, such channels being separated by a 95 tached thereto. The holder 10 is provided transverse ridge 27 on the holder, which ridge with a rearwardly extending arm l2, by acts as an intermediate support for the brake means of which the holder may be attached shoe. to the usual swinging brake beam. The brake For the purpose of reenforcing the holder,

shoe 11 isformed from some hard,.wear-rewebs 28 and 29 are provided between upper 100 sistingmetal, and is provided upon its rear and lower ends of the holder and the arm 12. curved side with dovetail projections 13 and The construction shown will effectively re- 14, of the vform shown in Fig. 3. Near its tain in position the parts of the brake shoe ends, the brake shoe holder is cutaway so as in the event that the latter becomes fracto form narrow portions 15 and 16and form tured while the car is in use, and will re 105 shoulders on which are arranged clamping main serviceable until inspection may show members 17 and 18, which latter when in the necessity for replacement. The very simplace, will substantially complete the brake ple clamping arrangements will permit reshoe holder as rectangular, viewing it from placement to be effected without diliiculty.

the front, as in Fig. 2. The opposed faces Having thus described our invention, what 11o and vlo we cla-im anddesire to. secure by LettersPatent .of the United States, is: i Y

LA. brake shoe holder having upper and lower' arms, each provided with a dovetailed recess extending longitudinally of said arms, in `combination with a brake shoe provided upon its rear side with dovetailedprojections near its ends and adapted to enter the said recesses, and means vupon the'ho'lder Jfor clamping the projections in the recesses.

f2.' A brake shoe holder having upper and lower arms forming" narrowed projections, clamping members (3o-operating with such projections, the opposed faces ofthe narrowed projections and the clamping members being formed;with'dovetailed recesses, in combination' with'a brake shoe having upon its rear side 1 near its` ends ydovetailed projections adapted'to enter the said recesses,;and means Y brake' v`shoehC/)lder"for clamping such proj'ectionsiin the fsaidreeesses'.v

Kir-elongated brakev sho-e having dove-f tailed rejections' o'n"l its rear side :near its v vhichfdovetailedfprojections arey disposedy longitudinally oijsai d shoe, in" 'combina tion with abrake shoe holder having `-upperA Harms providedy with `:means j for` whereby the ver engaging fthe said ections, bralre'shoe isisupported,upon the its opposite en-dsk y j j 4; In combination abrake shoe and a brake shoe holder,"said holdervhaving a rearwardly extending' supporting arn'r disposed 'midway of its vend portions',"each of'said end portions being provided with doyetailed projections' and dovetailedcl'amping members, said brake shoe beingA provided with dovetailed fportions `co-ofperatmg` with tions -and Vsai-d doveers. e a @brake shoe' holder said dovetailed proje' tailed4 clamp in g memb e111; mamon,

'holderr at'A orw ardly v extending having upperand lower arms, each of said arms having forwardly extending projections, clamping members cooperating with said projections, the opposed faces of said projections and said clamping members be.- ing formed with dove-tailed recesses and a brake shoe having upon its rear side near its ends dove-tailed portions adapted to enter saidrecesses, and means on said brake shoe holder for clamping said projections in said recesses, the lower 'face of the upper clamping member being grooved and the upper face of thelower clamping member being tongue tlofit wit-hin complementary portions of' said holder whereby to facilitate the shedding of moisture. i

6. Incombination, a brake shoe and a brake shoeholder, said holder having a rearwardly extending supporting arm disposed midway of 'its end portions, each ol' said end portions being provided 'with' forwardly extending dovetailediprojections and dovetailed clamping members, said brake shoe being provided with dovetailed portions cooperating with said dovetailed projections and said dovetailed clamping members, said clamping members includingupper and lower members, the lower face of the upper clamping member beinggrooved and the upper lace of the lower clamping member being tongued to lit within complementaryportions of said holder whereby to facilitate the shedding of moisture.

In testimony whereof, we append our signatures.- Y

Signed at Chicago, by NILs P. SJonRNe, on this 20th Vday of December, 1926.

jf I NILS l". SJOBRING. "Signed at Gottenborg, Sweden, by CARL ARTHUR CHRis'rENsoN, on this 30th day of November, 199.6; CARL ARTHUR CHRISTENSON. 

